I'm a mechanic myself mate so am confident in doing the work myself, I just need to source some of the wire. At the end of the day it's either going to be 1, 2 or all 3 of these things.. Knock sensor, wiring or ecu! I'll start with the easy bit replace the insulated part of the loom, if not that then try source a second hand ep91 4efte ecu then new knock sensor << In that order, I know the sensors are around £100+. Start cheap! Worst case scenario it's the sensor and it will cost me £100+